Diffusion in microstructured block copolymers: Chain localization and entanglements

M. C. Dalvi, C. E. Eastman, T. P. Lodge

Research output: Contribution to journalArticlepeer-review

100 Scopus citations


The diffusion (Ds) of entangled and unentangled symmetric block copolymers is compared, above and below the ordering transition. The lamellar samples were not macroscopically oriented, and thus Ds reflects a combination of mobilities parallel and perpendicular to the lamellar planes. For unentangled (Rouse) chains, Ds is unaffected by the microstructure, whereas entangled (reptating) chains are retarded significantly; this difference reflects an interesting combination of thermodynamic and entanglement constraints. Furthermore, this retardation persists into the nominally disordered state.

Original languageEnglish (US)
Pages (from-to)2591-2594
Number of pages4
JournalPhysical review letters
Issue number16
StatePublished - 1993


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